Crossword Genius

Ultimately, one fellow leaves when winter comes in New York? (5,3)

Ross

I believe the answer is:

after all

I'm a little stuck... Click here to teach me more about this clue!

'ultimately' is the definition.
(I've seen this in another clue)

'one fellow leaves when winter comes in new york?' is the wordplay.
I cannot really see how this works, but
'one' could be 'a' (a thing is one thing) and 'a' is present in the answer.
'fellow' could be 'al' (I've seen this in other clues) and 'al' is found within the answer.
'when' could be 'e' (I've seen this in other clues) and 'e' is found in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for after all that I've seen before include "most importantly" , "at the end of the day" , "Bringing up the rear" , "I mean, when everything's said and done" , "comes in last?" .)

I've seen this clue in The Guardian.
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